Search tool for early days of BTC on old hard drives? It was a notepad maybe.

Is there a program specifically designed to scan for Bitcoin? Years ago, I bought some Bitcoin and I vaguely remember storing it as a notepad file with some numbers. Unfortunately, I can't locate that file now. I have a stack of old hard drives and I'd like to search through them with the right tool. Does such a program exist that can help me recover my Bitcoin?